21182445

素因数分解:

$3^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1$

素因数の和:187

約数の個数: 64

約数和(自身を含む): 39916800

約数和(自身を除く): 18734355

約数列:

[1, 3, 5, 9, 15, 27, 41, 43, 45, 89, 123, 129, 135, 205, 215, 267, 369, 387, 445, 615, 645, 801, 1107, 1161, 1335, 1763, 1845, 1935, 2403, 3649, 3827, 4005, 5289, 5535, 5805, 8815, 10947, 11481, 12015, 15867, 18245, 19135, 26445, 32841, 34443, 47601, 54735, 57405, 79335, 98523, 103329, 156907, 164205, 172215, 238005, 470721, 492615, 516645, 784535, 1412163, 2353605, 4236489, 7060815, 21182445]

約数ペア:

[(1, 21182445), (3, 7060815), (5, 4236489), (9, 2353605), (15, 1412163), (27, 784535), (41, 516645), (43, 492615), (45, 470721), (89, 238005), (123, 172215), (129, 164205), (135, 156907), (205, 103329), (215, 98523), (267, 79335), (369, 57405), (387, 54735), (445, 47601), (615, 34443), (645, 32841), (801, 26445), (1107, 19135), (1161, 18245), (1335, 15867), (1763, 12015), (1845, 11481), (1935, 10947), (2403, 8815), (3649, 5805), (3827, 5535), (4005, 5289)]